Outlook 2007 Windows XP cant connect if IIS service run beyon wildcard certificate

Hi Team,

I have 2 exchange 2013 MBX+CAS. I plan to use wildcard public certificate as IIS services for all my Exchange.

I deploy wildcard, assign service and test it at browser and outlook in windows 7. no issue.

but when I test to windows XP machine SP2. outlook become issue, disconnect and prompt password.

heres the erro

I already change outlook provider but no good result. still disconnected. I am really sure outlook anywhere configuration for all my server is OK. no ssl offload and use NTLM.

please help :)  what is the root cause of this issue?

Thanks